the act of measuring or filling up the measuring instrument (see Molina)
IPAspelling:
tɬɑpepeʃoːniːlistɬi
Alonso de Molina:
tlapepexoniliztli. el acto de medir y henchir la medida assi. Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 131v. col. 1. Thanks to Joe Campbell for providing the transcription.